Hello everyone,
does anybody know that whether l4 linux now already support smp or not please?
As far as I know, linux 2.6.x already supports smp. So I am wondering the the l4-linux 2.6 supports smp or not. if yes, it is the linux kernel distributes the threads across the cores or the ukernel does this?
Any comment is welcome :-)
best regards,
Yang
On Fri Feb 29, 2008 at 15:23:01 +0100, Yang Xu wrote:
does anybody know that whether l4 linux now already support smp or not please?
It does.
As far as I know, linux 2.6.x already supports smp. So I am wondering the the l4-linux 2.6 supports smp or not. if yes, it is the linux kernel distributes the threads across the cores or the ukernel does this?
Linux distributes it's thread across it's vCPUs, and your vCPUs are where you put them.
Adam
Hello Adam,
thank you for your reply.
On 2/29/08, Adam Lackorzynski adam@os.inf.tu-dresden.de wrote:
On Fri Feb 29, 2008 at 15:23:01 +0100, Yang Xu wrote:
does anybody know that whether l4 linux now already support smp or not please?
It does.
So if I download the latest version of L4-linux, I can run it on a multiprocessor system, and it can make good use of all the cores , right?
As far as I know, linux 2.6.x already supports smp. So I am wondering the
the l4-linux 2.6 supports smp or not. if yes, it is the linux kernel distributes the threads across the cores or the ukernel does this?
Linux distributes it's thread across it's vCPUs, and your vCPUs are where you put them.
I don't know whether I understand this correctly. it is the linux that distributes the threads to all the cores, not the ukernel.
Does this mean that the ukernel doesn't realise the existence of the other cores?
thanks,
Best regards,
Yang
Adam
-- Adam adam@os.inf.tu-dresden.de Lackorzynski http://os.inf.tu-dresden.de/~adam/
l4-hackers mailing list l4-hackers@os.inf.tu-dresden.de http://os.inf.tu-dresden.de/mailman/listinfo/l4-hackers
On Mon Mar 03, 2008 at 10:16:00 +0100, Yang Xu wrote:
On 2/29/08, Adam Lackorzynski adam@os.inf.tu-dresden.de wrote:
On Fri Feb 29, 2008 at 15:23:01 +0100, Yang Xu wrote:
does anybody know that whether l4 linux now already support smp or not please?
It does.
So if I download the latest version of L4-linux, I can run it on a multiprocessor system, and it can make good use of all the cores , right?
Not currently as the µkernel is not ready yet.
As far as I know, linux 2.6.x already supports smp. So I am wondering the
the l4-linux 2.6 supports smp or not. if yes, it is the linux kernel distributes the threads across the cores or the ukernel does this?
Linux distributes it's thread across it's vCPUs, and your vCPUs are where you put them.
I don't know whether I understand this correctly. it is the linux that distributes the threads to all the cores, not the ukernel.
Does this mean that the ukernel doesn't realise the existence of the other cores?
It does but it won't move threads around itself. Userland (e.g. L4Linux) is supposed to do that and it does so as usual.
Adam
ok I see.... thanks. so if we run a RTOS above the ukernel, the RTOS should have the ability to distribute the threads. ukernel only offers the most basic services: address mapping, IPC, naming and so on.
On 3/3/08, Adam Lackorzynski adam@os.inf.tu-dresden.de wrote:
On Mon Mar 03, 2008 at 10:16:00 +0100, Yang Xu wrote:
On 2/29/08, Adam Lackorzynski adam@os.inf.tu-dresden.de wrote:
On Fri Feb 29, 2008 at 15:23:01 +0100, Yang Xu wrote:
does anybody know that whether l4 linux now already support smp or
not
please?
It does.
So if I download the latest version of L4-linux, I can run it on a multiprocessor system, and it can make good use of all the cores ,
right?
Not currently as the µkernel is not ready yet.
As far as I know, linux 2.6.x already supports smp. So I am wondering
the
the l4-linux 2.6 supports smp or not. if yes, it is the linux
kernel
distributes the threads across the cores or the ukernel does this?
Linux distributes it's thread across it's vCPUs, and your vCPUs are where you put them.
I don't know whether I understand this correctly. it is the linux that distributes the threads to all the cores, not the ukernel.
Does this mean that the ukernel doesn't realise the existence of the
other
cores?
It does but it won't move threads around itself. Userland (e.g. L4Linux) is supposed to do that and it does so as usual.
Adam
Adam adam@os.inf.tu-dresden.de Lackorzynski http://os.inf.tu-dresden.de/~adam/
l4-hackers mailing list l4-hackers@os.inf.tu-dresden.de http://os.inf.tu-dresden.de/mailman/listinfo/l4-hackers
On Tue Mar 04, 2008 at 11:45:21 +0100, Yang Xu wrote:
ok I see.... thanks. so if we run a RTOS above the ukernel, the RTOS should have the ability to distribute the threads. ukernel only offers the most basic services: address mapping, IPC, naming and so on.
Yes, exactly.
On 3/3/08, Adam Lackorzynski adam@os.inf.tu-dresden.de wrote:
On Mon Mar 03, 2008 at 10:16:00 +0100, Yang Xu wrote:
On 2/29/08, Adam Lackorzynski adam@os.inf.tu-dresden.de wrote:
On Fri Feb 29, 2008 at 15:23:01 +0100, Yang Xu wrote:
does anybody know that whether l4 linux now already support smp or
not
please?
It does.
So if I download the latest version of L4-linux, I can run it on a multiprocessor system, and it can make good use of all the cores ,
right?
Not currently as the µkernel is not ready yet.
As far as I know, linux 2.6.x already supports smp. So I am wondering
the
the l4-linux 2.6 supports smp or not. if yes, it is the linux
kernel
distributes the threads across the cores or the ukernel does this?
Linux distributes it's thread across it's vCPUs, and your vCPUs are where you put them.
I don't know whether I understand this correctly. it is the linux that distributes the threads to all the cores, not the ukernel.
Does this mean that the ukernel doesn't realise the existence of the
other
cores?
It does but it won't move threads around itself. Userland (e.g. L4Linux) is supposed to do that and it does so as usual.
Adam
Adam adam@os.inf.tu-dresden.de Lackorzynski http://os.inf.tu-dresden.de/~adam/
l4-hackers mailing list l4-hackers@os.inf.tu-dresden.de http://os.inf.tu-dresden.de/mailman/listinfo/l4-hackers
l4-hackers mailing list l4-hackers@os.inf.tu-dresden.de http://os.inf.tu-dresden.de/mailman/listinfo/l4-hackers
Adam
l4-hackers@os.inf.tu-dresden.de
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Adam Lackorzynski -
Yang Xu